Bearing rotating rings of tie had Ying volume than general situation large, and this on roll road deformation and bearing life are has adverse of effect, therefore in May of situation Xia, hopes had Ying volume appropriate reduced, this requirements reduced tie surface of rough degrees, while maintained lubrication normal, because lubrication if failure, overload Xia roll road surface had large of friction moments makes tie surface Peristaltic trend strengthened, even appears skidded phenomenon, while these phenomenon more occurred out ring,-but serious Shi within ring also in by inevitably.
Only after the precision to take effective countermeasures only allow appropriate reduction of heavy bearing combined with an interference and interference are slightly reduced, on the improvement of bearing stress are larger, of course, the benefits of thick oil film even more.
Bearing age reasons in advance:
1. poor lubrication: due to a serious shortage of dry aging of grease or oils. Because of motor high speed operation friction heat, bearing high temperature oxidizing discoloration, ball cage and inner ring of the bearing and axle journal such as brown or blue.
2. tie too tight: force after the journal when the bearing inner ring, light will enable Raceway has serious wear ring on the bottom track, sliding on the inner and outer rings and balls are cracked or peeling. Cause: the ball and ramp space was too small, increase torque, friction increases bearing operating temperature is too high, bearing wear and fatigue failure.
3. the material fatigue due to metal fatigue, Germany FAG bearing Raceway surface and the ball falls off of irregular fragments mixed in grease, can grow its work noise, ball is sliding, led to increased bearing radial clearance, and shaft end permissible radial increase swing of 2~3 times. Determinants of bearing fatigue include: motor load, speed, Air gaps, cover type, toughness of materials, quality grease and grease filling.
4. strong vibration: when motor cores has a failure, makes the strong vibration of the bearing. Reason: core thermal deformation; ageing of the motor bearings; hinge bending deformation of large end cap stops the mouth tighten bolts due to vibration loosening; Foundation of sturdy bearing vibrations.
Bearing clearance adjustment:
1. adjusting bolt method: pressure in the pressure ring on the outer ring of the bearing, by adjusting bolt compression; before the compression adjustment, first measure the pitch adjustment bolt, then tighten adjusting bolt slowly until the bearing until there was no gap, and then figure out the rotation angle adjustment bolt. For example pitch of 1.5mm, bearing the clearance needed for the proper functioning.
2. adjustment gasket law: in bearing end cover and bearing block end surface Zhijian filled placed a group soft material (soft steel tablets or elastic paper) gasket; adjustment Shi, first does not placed gasket loaded Shang bearing end cover, side uniform to screwed tight bearing end cover Shang of screws, side with hand turn axis, until bearing scroll body and outer ring contact and axis internal no gap weizhi; then measurement bearing end cover and bearing block end surface Zhijian of gap, again plus bearing in normal work Shi by needs of axis to gap.




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